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hw/arm/virt: Make EL2 accelerator check an accept-list

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Currently only the TCG and qtest accelerators can handle an EL2
guest.  Instead of making the condition check be "fail if KVM or HVF"
(an exclude-list), make it a be "allow if TCG or qtest" (an
accept-list).

This is better for if/when we add new accelerators, as it makes the
default be that we forbid an EL2 guest.  This is the most likely to
be correct and also "fails safe"; if the new accelerator really can
support EL2 guests then the implementor will see that they need to
add it to the accept-list.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20250623121845.7214-20-philmd@linaro.org
[PMM: rewrote commit message]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2025-07-01 15:08:34 +01:00 • committed by Peter Maydell
parent 1370fd56ec
commit 164258da4a
1 changed files with 1 additions and 1 deletions
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2
hw/arm/virt.c
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@ -2207,7 +2207,7 @@ static void machvirt_init(MachineState *machine)
exit(1);
}
if (vms->virt && (kvm_enabled() || hvf_enabled())) {
if (vms->virt && !tcg_enabled() && !qtest_enabled()) {
error_report("mach-virt: %s does not support providing "
"Virtualization extensions to the guest CPU",
current_accel_name());